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UPSC 2013: Variations in the length of daytime and night-time from season to season are due to
(a)the earth's rotation on its axis
(b)the earth's revolution round the sun in an elliptical manner
(c)latitudinal position of the place
(d)revolution of the earth on a tilted axis
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Not attemptedCorrect Answer: (d) revolution of the earth on a tilted axis
Seasonal changes in day-length arise because the Earth’s axis is tilted (23.5°) and the planet revolves around the Sun; this tilt causes varying solar illumination at different times of the year. Hence option (d) is correct. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-2013-question-64/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2013 Geography question?▼
The correct answer is option (d): revolution of the earth on a tilted axis. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Astronomy & Earth–Sun System question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2013, GS Paper 1, as Question 14. It falls under Geography > Astronomy & Earth–Sun System.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Astronomy & Earth–Sun System?▼
UPSC has asked 27 questions from Astronomy & Earth–Sun System (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.